Page 2 | RDF Installation Supplement
Caution
FOR GENERALVENTILATING USEONLY.DO NOT USETO EXHAUST
HAZARDOUS OR EXPLOSIVE MATERIALS AND VAPORS.
Warning
TO REDUCETHE RISK OF FIRE, ELECTRIC SHOCK, OR INJURYTO
PERSONS, OBSERVE THE FOLLOWING:
1. Usethisunitonlyinthemannerintendedbythemanufacturer.
If you have any questions, contact the manufacturer.
2. Beforeservicingorcleaningtheunit,switchpoweroatservice
panel and lock service panel to prevent power from being
switched on accidentally. When the service disconnecting
means cannot belocked, securelyfasten a prominent warning
device, such as a tag, to the service panel.
In addition to the following manufacturer’s instructions, it is
necessary to comply with federal, state, and local government
codes. Your purchase of this ALDES North America system
represents an investment in the health and comfort of occupants,
as well as an investment in the protection of the building from the
damaging eects of excessive indoor humidity.
This model of centrifugal fan is designed for multiple purposes. It
may be used as an in-line rectangular duct fan (Model RDF) or a
manifolded, multi-port fan for multiple exhaust or supply points.
It may be installed in a remote location such as an attic space,
mechanical room, above a drop ceiling, in a closet or in a laundry
room, to provide quiet exhaust of stale, humid, or otherwise
polluted air from bathrooms, kitchens, laundry rooms, or storage
rooms via exhaust grilles and ducting to the centrally located
fan, which is ducted to the outdoors. With small return grilles
in bedrooms and other areas, and one duct connection to the
outdoors, such as the BVS models, it may also be used as a supply
ventilator or recirculating central ventilator for the introduction
of outdoor air, raising the temperature of the fresh air by
mixing with recirculated indoor air. When used with adjustable
balancing grilles or ALDES Constant Airow Regulators (CAR) and
compatible roof/wall caps, ducting, etc., the fan is the heart of a
complete pre-engineered ventilation system.
System Design
Satisfactory performance of a central ventilation system requires
the proper integration of all the components:
• Fan selection for airow, pressure and acoustic properties,
vibration characteristics and mounting method, and mode of
operation (continuous, manually or automatically controlled)
• Proper duct design for friction losses, with compatible supply
or exhaust grilles (airow and acoustic properties of the supply/
exhaust grilles), and compatible wall/roof caps
• Method of balancing airows of multi-point ventilation systems
• Consideration for potential condensation in the ducting or fan
housing (installation in an unheated space)
Duct Connections
Ducting may be exible or rigid, depending on local codes. If
permitted by code, insulated exible ducting is recommended.
To limit fan noise, at least 8 feet of insulated exible duct shall
be installed between the fan and grille(s). All exible duct
connections shall be secured with clamps or wire ties and
sealed with mastic or code-approved duct tape. All rigid ducts
are to be sealed on both ends and along the longitudinal seams
with mastic or code-approved duct tape.
Ducting shouldconform toNFPA90A and meettherequirements
of UL as a Class 0 or Class 1 duct to specication UL 181, Standard
for Factory-Made Air Ducts and Duct Connectors.
Installation Warning
TO REDUCE THE RISK OF FIRE, ELECTRIC SHOCK, OR INJURY
TO PERSONS, OBSERVE THE FOLLOWING:
1. Installation work and electrical wiring must be done by
qualied person(s) in accordance with all applicable codes
and standards, including re-rated construction.
2. Sucient air is needed for proper combustion and
exhausting of gases through the ue (chimney) of fuel-
burning equipment to prevent backdrafting. Follow the
heating equipment manufacturer’s guidelines and safety
standards such as those published by the National Fire
Protection Association (NFPA), the American Society for
Heating, Refrigeration and Air Conditioning Engineers
(ASHRAE), and the local code authorities.
3. When cutting or drilling into wall or ceiling, do not damage
electrical wiring and other hidden utilities.
4. When used as exhaust fans, ducted fans must always be
vented to the outdoors.
5. If this unit is to be installed over a tub or shower, it must
be marked as appropriate for the application and be
connected to a GFCI- (Ground Fault Circuit Interrupter)
protected branch circuit.
6. NEVER place a switch where it can be reached from a tub
or shower.
MAINTENANCE
MONTHLY:Inspect and clean the exhaust grilles and
lters, if so equipped.
ANNUALLY: To ensure the maximum eciency of the
fan unit, it is recommended to clean the inside of the
fan box as well as the blower wheel.
